Here is what I would do:
Get a blood test completed. Make sure you aren't deficient with your iron or that you do not have something like mono. If the results are fine then, find a good weather day in early October, now that you are running again, and jump into no-pressure 5k race just to see where you are from a fitness prospective. You have to know the truth in order to assess fitness and train accordingly.
Then, google Tom Schwartz (Tinman) and his 3-day rotation where he ran only 5 miles per day (easy, medium, somewhat hard) and use that as a template for your training going forward. It is simple and it works when "life" happens. The hardest part about the plan is being consistent and having self-disciple and restraint.
Easy = current day's 5k pace plus 2:00 - 2:30 / mile - just go easy
Medium = 1 mile easy, then current day's 5k pace plus 1:30 down to 1:00/ mile by the end. 4 x 100m strides at 1500m effort at the end. 1 mile easy
Somewhat hard = 1 mile easy, then either a, b, or c (below), followed by 4 x 30 sec hills at 800m race effort (or flat 150-200's if you are in Florida), followed by 4 x 50m at 400m race effort, 1 mile easy
A) 3 x 1 mile at current day's 5k race pace + 25 sec / mile
B) 4 x 1000m at current day's 5k race pace + 15 sec / mile
C) 3 mile progression run starting at current day's 5k race pace + 50 sec / mile, working down to 5k + 30's / mile by the end.
When you get through the first easy, medium, hard cycle, go back to easy and start the 3-day rotation all over again. This routine is not physically or mentally demanding, but it gets results. It is only 35 mpw of running but can get you to your goal without killing yourself in training. Best of all, you will begin to "feel" the efforts after a few weeks and not need the watch. Jump into a 5k once every 3 weeks to see where you are and how your fitness is improving.
Current day's 5k Pace = What you could run TODAY in your current shoes,
current terrain, current weather, etc. (i.e. not PR pace, not goal pace and not the pace you should be able to run if x, y, z)
Last thing - I would recommend running in the afternoons and adjust your efforts according instead of trying to cram it in before work. My opinion.
Good luck!